Resolution
750 x 1334 px
Weight
156 g
General info
| Internal Storage i | 32GB (7 others) |
| Audio Outputs i | 3.5 mm, 4.4 mm, USB-C (3 others) |
| Dac name i | Cirrus Logic CS43198 x2 (1 other) |
| Audio File Types i | MP3, FLAC, MQA, DXD, DSD, APE, ALAC, AIFF, WAV, WMA, OGG, AAC, DFF |
| Battery Life i | 12.5 hours |
| Release date i | 1 year ago01/01/2025 |
| Charge time i | 2 hours (3 others) |
| Has an external memory slot i | ✔ (37 others) |
| Signal to noise ratio (snr) i | 130 dB (1 other) |
Design
| Screen Size i | 4.7" (3 others) |
| Resolution i | 750 x 1334 px (1 other) |
| Pixel Density i | 326 ppi (2 others) |
| Weight i | 156 g |
| Display Type i | LCDFiiO JM21 |
| Has a touch screen i | ✔ (37 others) |
| Volume i | 106.7 cm³ |
| Width i | 68 mm (1 other) |
| Thickness i | 13 mm |
Connectivity
| Bluetooth Version i | 5 (15 others) |
| Has aptx i | ✔ (23 others) |
| Has ldac i | ✔ (20 others) |
| Has ldhc i | ✔ (9 others) |
| Has aptx hd i | ✔ (19 others) |
| Has aptx adaptive i | ✖ |
| Has aptx lossless i | ✖ |
| Has aac i | ✔ (24 others) |
| Has aptx low latency i | ✖ |
Miscellaneous
| Has gps i | ✖ |
Similar products
Frequently Asked Questions
How many audio outputs does the FiiO JM21 have?
At 3.5 mm, 4.4 mm, USB-C, the FiiO JM21 ranks #2 out of 27 — see ranking mp3 player products — one of the Highest audio outputs in this category.
What is the signal-to-noise ratio (snr) of the FiiO JM21?
At 130 dB, the FiiO JM21 ranks #2 out of 21 — see ranking mp3 player products — one of the Highest signal-to-noise ratio (snr) in this category.
How long does the FiiO JM21 take to charge?
At 2 hours, the FiiO JM21 is 33% below the category average for charge time, ranking #4 out of 20 — see ranking mp3 player products.
How much storage does the FiiO JM21 offer?
At 32GB, the FiiO JM21 is 39% below the category average for storage, ranking #24 out of 56 — see ranking mp3 player products.
What is the battery life of the FiiO JM21?
At 12.5 hours, the FiiO JM21 is 36% below the category average for battery life, ranking #17 out of 27 — see ranking mp3 player products.
How big is the FiiO JM21 screen?
At 4.7", the FiiO JM21 is 36% above the category average for screen size, ranking #12 out of 52 — see ranking mp3 player products.
What is the pixel density of the FiiO JM21?
At 326 ppi, the FiiO JM21 is 26% above the category average for pixel density, ranking #9 out of 45 — see ranking mp3 player products.
How does it compare?
How does the FiiO JM21's battery life compare to similar mp3 playerss?
At 12.5 hours, the FiiO JM21 trails the Sony Walkman NW-A306 (36 hours) by 65%.
How does the FiiO JM21's weight compare to similar mp3 playerss?
At 156 g, the FiiO JM21 trails the Cowon J3 32GB (76 g) by 51%.
How does the FiiO JM21's pixel density compare to similar mp3 playerss?
At 326 ppi, the FiiO JM21 leads the Cowon J3 32GB (167 ppi) by 49%.
How does the FiiO JM21's charge time compare to similar mp3 playerss?
At 2 hours, the FiiO JM21 leads the Sony Walkman NW-A306 (3.5 hours) by 43%.
How does the FiiO JM21's screen size compare to similar mp3 playerss?
At 4.7", the FiiO JM21 leads the Cowon J3 32GB (3.3") by 30%.
How does the FiiO JM21's signal-to-noise ratio (snr) compare to similar mp3 playerss?
At 130 dB, the FiiO JM21 leads the HiBy R4 (123 dB) by 5%.